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Finding the Fourth Proportional to 7,661.88, 11,487.66 and 2,662.98

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Solution

The fourth proportional to 7,661.88, 11,487.66 and 2,662.98 is: 3,992.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,661.88 : 11,487.66 = 2,662.98 : x
  2. Step 2: Convert to fraction form
    7,661.88/11,487.66 = 2,662.98/x
  3. Step 3: Cross multiply
    7,661.88x = 11,487.66 × 2,662.98
  4. Step 4: Simplify right side
    7,661.88x = 30,591,408.83
  5. Step 5: Solve for x
    x = 30,591,408.83/7,661.88
  6. Step 6: Final answer
    x = 3,992.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.